Problem

Only 6 of 25+ commands have any test coverage (tests/cli_tests.rs, 393 lines). Ship, merge, sync, undo, adopt, and diff are completely untested.

Proposed Solution

Prioritize testing:

1. ship --no-pr (no network required)
2. sync (local bare repo)
3. undo (local operations)
4. adopt (local operations)
5. Add mock HTTP server for GitHub API tests (merge, ci)

Category: enhancement | Priority: low